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온라인 분체입도측정장치의 개발을 위한 레이저광 회절분석의 실험적 연구-이차원 모델입자의 경우-

Experimental Study on the Laser Diffraction Analysis for Development of an On-Line Particle Size Analyser

HWAHAK KONGHAK, April 1982, 20(2), 133-142(10), NONE
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Abstract

광회절을 이용한 분체 입도의 분석에 미치는 입자 변수의 영향을 조사하기 위하여 구형 및 사각형의 이차원 모델입자를 슬라이드 필름으로 사진촬영하여 레이저광 회절 실험을 시행하였다.
광회절 무늬에서 계산된 입자크기는 표준편차 1∼15 %의 범위 내에서 현미경 측정치와 일치하였다.
입자의 농도를 필름상의 면적비율로 정의하면, 광회철 무늬의 강도를 선명하게 식별할 수 있는 입자농도의 하한은 2 % 이상이어야 함이 밝혀졌다.
사각형 입자에 대한 분석 결과는 사각형의 가로의 길이에 가까운 상당크기로 표시되는 평균입자 크기를 계산할 수 있을 뿐이었다.
In order to investigate the influence of particle parameters on the evaluation of the light diffraction pattern analysis, 2-dimensional model particles were produced by photographing round particles and rectangular ones on the slide film respectively, and were experimentally analysed in the He-Ne laser diffraction system. The particle parameters were size, concentration, and shape of the particle images on the film. The results coincided with the microscopic ones within the standard deviation of 1 to 15 %.
The particle concentration, defined as the ratio of the particle image area to the total slide area, was suggested to be above 2 % in order to eliminate errors in analysing the intensity of the diffraction pattern. For rectangular particles, the evaluated equivalent size approached only to the width of the particle.

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